From 1964 until 1982, my father was a Yamaha Franchised Dealer in East Texas.
I remember that he became a dealer the same year (1964) that the infamous YDS3, 246cc 2-stroke with the "Yama-Lube" oil injection system was first offered .
In November 1971, my father and I traveled to the Buena Park, CA, which at that time was the Yamaha International Coorporation Headquarters location, and picked up one of the first 1972 XS2 650's to arrive stateside. The Vin is # 100214, which is year production bike number 113. I still have this 1972 XS2 (and the Compression Release Starter Still Works).